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Stellate Ganglion Block as Adjuvant Therapy to ca Channel Blocker

2019-09-27 06:30:41 | BioPortfolio

Summary

Aim of work:

To evaluate the effect of stellate ganglion block in prevention of cerebrovascular spasm in traumatic subarachnoid hemorrhage Primary outcome: Asses changes of cerebral blood flow velocity by Trans cranial Doppler.

Secondary outcome: Asses changes in clinical status

Description

A subarachnoid hemorrhage is a relatively uncommon type of stroke incidence and impact of traumatic brain injury hemorrhage (aSAH) has been extensively studied; less is (TBI) within the general population have increased known regarding the epidemiology of posttraumatic passover the past few years . It accounts for about 1 in 20 (5%) of all strokes. In contrast to common types of stroke, subarachnoid hemorrhage often occurs at a relatively young age half the patients are younger than 60 years. The outcome of patients after subarachnoid hemorrhage is generally poor. One of the causes of poor outcome is due to spasm and lack of blood supply to brain this occurs four to ten days after the hemorrhage.

Calcium antagonists as nimodipine are a type of drug that block calcium channels in cells and are often used for the treatment of high blood pressure. They have also been shown to counteract the narrowing of blood vessels after subarachnoid hemorrhage. Nimodipine is a dihydropyridine agent that blocks voltage-gated calcium channels and has a dilatory effect on arterial smooth muscle. It is the only FDA-approved agent for vasospasm with a half-life of about 9 h . Its beneficial effect on CVS derives most likely from its neuroprotective properties compared to arterial smooth muscle cell relaxation . The investigators can give nimodipine in several way as oral or IV and intrathecal .

Stellate ganglion block (SGB) has an established use in treating patients with disorders mediated by the sympathetic nervous system in which pain and/or circulatory insufficiency are predominant symptoms. These disorders include Atypical angina , post-herpetic neuralgia and complex regional pain syndromes, such as reflex sympathetic dystrophy .In addition, SGB has also been used, albeit somewhat controversially, in management of traumatic brain edema, schizophrenia, and complicated cervical migraine. However, the use of cervical sympathetic block has been described in reversing delayed ischemic neurologic deficit following aneurysmal subarachnoid hemorrhage.

The cerebral blood vessels, in particular the pia vessels, have a dense non-adrenergic sympathetic nerve supply that originates mainly in the cervical ganglia and accompanies the carotid artery to project into the ipsilateral hemisphere. There is controversy over the physiological significance of sympathetic innervation of the cerebral vasculature and the effect of SGB on it.The intracerebral vessels constrict in response to cervical sympathetic stimulation and dilate when these fibers are interrupted. The release and re-uptake of neurotransmitters, such as bradykinin, which is released during injury, can be prevented by sympathectomy. A recent report has suggested that cervical sympathetic block may be beneficial in patients with subarachnoid haemorrhage and that SGB may have therapeutic value in relieving cerebral vasospasm in certain neurological conditions. Anecdotal mention of SGB in some recent literature encourages the debate on its role as an adjunct to standard therapy for cerebral vasospasm, albeit, with a strong need for further evaluation

Study Design

Conditions

Subarachnoid Hemorrhage

Intervention

stellate ganglion block by transcranial doppler, Nimodipine

Location

ِAssiut University Hospital
Assiut
Egypt
1111111

Status

Not yet recruiting

Source

Assiut University

Results (where available)

View Results

Links

Published on BioPortfolio: 2019-09-27T06:30:41-0400

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Medical and Biotech [MESH] Definitions

Interruption of sympathetic pathways, by local injection of an anesthetic agent, at any of four levels: peripheral nerve block, sympathetic ganglion block, extradural block, and subarachnoid block.

Bleeding into the intracranial or spinal SUBARACHNOID SPACE, most resulting from INTRACRANIAL ANEURYSM rupture. It can occur after traumatic injuries (SUBARACHNOID HEMORRHAGE, TRAUMATIC). Clinical features include HEADACHE; NAUSEA; VOMITING, nuchal rigidity, variable neurological deficits and reduced mental status.

A paravertebral sympathetic ganglion formed by the fusion of the inferior cervical and first thoracic ganglia.

Method of treating pain associated with the sphenopalatine ganglion located in the PTERYGOPALATINE FOSSA, posterior to the middle nasal turbinate. The transnasal approach involves application of suitable local anesthetic to the mucous membrane overlying the ganglion.

Bleeding into the SUBARACHNOID SPACE due to CRANIOCEREBRAL TRAUMA. Minor hemorrhages may be asymptomatic; moderate to severe hemorrhages may be associated with INTRACRANIAL HYPERTENSION and VASOSPASM, INTRACRANIAL.

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